🌐EnglishEnglishEspañolSvenskaTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ7451460· pop 18Category:Duality theoriesWikimedia categoryAvailable in 18 languagesEspañol中文日本語РусскийالعربيةBasquebe_x_oldCzechEsperanto